Yamaha YZ 2017 Series, Owner'S Service Manual, Page: 91 / 410

MAINTENANCE INTERVALS
3-3
NUT (ROTOR)
Retighten Check for tightening torques.
EXHAUST PIPE, SI-
LENCER, PROTEC-
TOR
Inspect and re-
tighten
Check for exhaust leaks, and
tightening torques.
Clean
Replace fiver *
* When the exhaust sound be-
comes louder or when a per-
formance drop is felt.
CRANKSHAFT
Inspect and clean
THROTTLE BODY
Inspect
AIR FILTER
Clean and lubri-
cate
Use foam air-filter oil or equiv-
alent oil.
Replace
BREATHER SYS-
TEM
Inspect Check ventilation hose for
cracks or damage and drain
any deposits.
Replace Every two years
SPARK PLUG
Inspect and clean Check the electrodes and the
terminals for wear.
Replace
COOLING SYSTEM
Check coolant lev-
el and leakage
Check radiator cap
operation
Use the radiator cap tester for
a checkup.
Check radiator cap
attached
Change the cool-
ant
Every two years
Inspect hoses
ITEM
After
break-
in
Every
race
(about
2.5
hours)
Every
third
(about
7.5
hours)
Every
fifth
(about
12.5
hours)
As re-
quired
Remarks